--- a/netwerk/dns/nsHostResolver.cpp
+++ b/netwerk/dns/nsHostResolver.cpp
@@ -276,25 +276,34 @@ nsHostRecord::ResolveComplete()
             AccumulateCategorical(Telemetry::LABELS_DNS_LOOKUP_DISPOSITION::trrAAAAOK);
         } else if (mTrrAAAAUsed == FAILED) {
             AccumulateCategorical(Telemetry::LABELS_DNS_LOOKUP_DISPOSITION::trrAAAAFail);
         }
     }
 
     if (mTRRUsed && mNativeUsed && mNativeSuccess && mTRRSuccess) { // race or shadow!
         static const TimeDuration k50ms = TimeDuration::FromMilliseconds(50);
+        static const TimeDuration k100ms = TimeDuration::FromMilliseconds(100);
         if (mTrrDuration <= mNativeDuration) {
-            AccumulateCategorical(((mNativeDuration - mTrrDuration) > k50ms) ?
-                                  Telemetry::LABELS_DNS_TRR_RACE::TRRFasterBy50 :
-                                  Telemetry::LABELS_DNS_TRR_RACE::TRRFaster);
+            if ((mNativeDuration - mTrrDuration) > k100ms) {
+                AccumulateCategorical(Telemetry::LABELS_DNS_TRR_RACE2::TRRFasterBy100);
+            } else if ((mNativeDuration - mTrrDuration) > k50ms) {
+                AccumulateCategorical(Telemetry::LABELS_DNS_TRR_RACE2::TRRFasterBy50);
+            } else {
+                AccumulateCategorical(Telemetry::LABELS_DNS_TRR_RACE2::TRRFaster);
+            }
             LOG(("nsHostRecord::Complete %s Dns Race: TRR\n", host.get()));
         } else {
-            AccumulateCategorical(((mTrrDuration - mNativeDuration) > k50ms) ?
-                                  Telemetry::LABELS_DNS_TRR_RACE::NativeFasterBy50 :
-                                  Telemetry::LABELS_DNS_TRR_RACE::NativeFaster);
+            if ((mTrrDuration - mNativeDuration) > k100ms) {
+                AccumulateCategorical(Telemetry::LABELS_DNS_TRR_RACE2::NativeFasterBy100);
+            } else if ((mTrrDuration - mNativeDuration) > k50ms) {
+                AccumulateCategorical(Telemetry::LABELS_DNS_TRR_RACE2::NativeFasterBy50);
+            } else {
+                AccumulateCategorical(Telemetry::LABELS_DNS_TRR_RACE2::NativeFaster);
+            }
             LOG(("nsHostRecord::Complete %s Dns Race: NATIVE\n", host.get()));
         }
     }
 
     if (mTRRUsed && mNativeUsed) {
         // both were used, accumulate comparative success
         AccumulateCategorical(mNativeSuccess && mTRRSuccess?
                               Telemetry::LABELS_DNS_TRR_COMPARE::BothWorked :

--- a/toolkit/components/telemetry/Histograms.json
+++ b/toolkit/components/telemetry/Histograms.json
@@ -3242,22 +3242,23 @@
     "kind": "exponential",
     "high": 60000,
     "releaseChannelCollection": "opt-out",
     "alert_emails": ["necko@mozilla.com", "dstenberg@mozilla.com"],
     "bug_numbers": [1434852],
     "n_buckets": 50,
     "description": "Time for a completed native name resolution (msec)"
   },
-  "DNS_TRR_RACE": {
+  "DNS_TRR_RACE2": {
     "record_in_processes": ["main"],
     "alert_emails": ["necko@mozilla.com", "dstenberg@mozilla.com"],
     "expires_in_version": "never",
     "kind": "categorical",
-    "labels": ["TRRFasterBy50", "TRRFaster", "NativeFaster", "NativeFasterBy50"],
+    "labels": ["TRRFasterBy100", "TRRFasterBy50", "TRRFaster", "NativeFaster", "NativeFasterBy50",
+               "NativeFasterBy100"],
     "bug_numbers": [1434852],
     "description": "DNS: TRR parallel resolve racing results"
   },
   "DNS_TRR_COMPARE": {
     "record_in_processes": ["main"],
     "alert_emails": ["necko@mozilla.com", "dstenberg@mozilla.com"],
     "expires_in_version": "never",
     "kind": "categorical",